/*  
 * Copyright (C) 2011 Marta Spodymek
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *  
 */
package org.prometheuscode.web.feedback.file;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import java.util.List;
import java.util.Map;

import org.prometheuscode.web.feedback.ProcessingException;

/**
 * This file strategy implements saving logic.
 * 
 * @author marta
 * 
 */
public class FileSaverStrategy implements IFileHandlerStrategy {

    public FileSaverStrategy() {
    }

    @Override
    public void process(FileStrategyInfo info) {

	List<FileInfo> files = info.getFiles();
	/* this map is a map < File name --> path to save > */
	Map<String, String> data = (Map<String, String>) info.getData();

	for (FileInfo fileInfo : files) {
	    InputStream in = fileInfo.getInputStream();
	    String pathToSave = data.get(fileInfo
		    .getInfo(FileInfo.POSTED_NAME_INFO));

	    /* normalize */
	    Path virtualPath = FileSystems.getDefault().getPath(pathToSave);
	    pathToSave = virtualPath.toString();

	    String dirs = pathToSave.substring(0,
		    pathToSave.lastIndexOf(File.separator));
	    Path dirPath = FileSystems.getDefault().getPath(dirs);
	    try {
		Files.createDirectories(dirPath);
		Files.copy(in, virtualPath, StandardCopyOption.REPLACE_EXISTING);
	    } catch (IOException e) {
		throw new ProcessingException("Problems in writting input file");
	    }

	}

    }

}
